Factor of Safety (FOS) Calculator

Calculate Your Factor of Safety

Specify in consistent units (e.g., psi, MPa, N, lbs).
Specify in consistent units (e.g., psi, MPa, N, lbs).

Use our free Factor of Safety (FOS) Calculator to quickly determine the safety margin of your designs. Understand the relationship between ultimate strength and applied load to ensure structural integrity and prevent material failure. Essential for engineers and students in mechanical, civil, and aerospace fields, guaranteeing designs meet safety standards.

Formula:

The Factor of Safety (FOS) is calculated as follows:

FOS = Ultimate Strength / Applied Load

  • Ultimate Strength: The maximum stress a material or component can withstand before failure (e.g., Yield Strength, Ultimate Tensile Strength, Failure Load).
  • Applied Load: The actual stress or load experienced by the material or component during normal operation (e.g., Working Stress, Design Load).

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